Pumping type multi-gas online monitoring analysis box for closed space

Abstract

The utility model relates to the technical field of gas on-line monitoring analysis, in particular to a pumping type multi-gas on-line monitoring analysis box for a closed space, which comprises a box body and a bridge frame. Through the arrangement of a gas inlet cover, a first oil-water filter, a first air filter, a first diaphragm pump, a combustible gas detector, a second diaphragm pump, a VOCs volatile organic compound detector, a second oil-water filter, a gas mixing tank, a second air filter and a wastewater collection box, the device can extract and detect gas in a closed space; then the detected gas is discharged into the closed space again, gas circulation can be formed, gas detection is continuously carried out, the atmosphere cannot be polluted, the device can be fixed to the outer side of the closed space, and if the liquid level in the closed space changes, the fixing position and height of the device can be conveniently changed; and normal gas detection is ensured, and meanwhile, workers can conveniently overhaul.

Description

Technical Field

[0001] The utility model relates to the technical field of gas online monitoring and analysis, in particular to a pump-suction type multi-gas online monitoring and analysis box used in a confined space. Background Art

[0002] Gas detector is an instrument for detecting gas concentration. This instrument is suitable for dangerous places where flammable or toxic gases exist. It can continuously detect the content of the measured gas in the air within the lower explosion limit for a long time. It can be widely used in various industries where flammable or toxic gases exist, such as gas, petrochemical, metallurgy, steel, coking, electricity, etc.

[0003] However, the internal environment of some confined spaces (such as garbage bins, leachate pools, exhaust gas pipes, etc.) is very harsh, with high concentrations of various gases. The gases produced are mostly toxic and flammable gases such as methane, hydrogen sulfide, carbon monoxide, and ammonia. There are also wastes such as waste liquid and garbage. The amount and volume of solid matter vary, and the liquid level is generally not fixed. Some existing gas detectors can only be installed at a certain point inside the confined space, but will be buried by garbage or waste liquid due to the increase of garbage or liquid in the confined space, resulting in their inability to be used normally. Once the instrument is damaged, it is also very dangerous for the staff to enter the confined space for maintenance and replacement. Therefore, in view of the above problems, a pump-suction multi-gas online monitoring and analysis box for confined spaces is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a pump-suction multi-gas online monitoring and analysis box for a confined space, so as to solve the problem that some existing gas detectors can only be installed at a certain point inside the confined space, but will be buried by garbage or waste liquid due to the increase of garbage or liquid in the confined space, resulting in the inability to use them normally, and once the instrument is damaged, it is also very dangerous for the staff to enter the confined space for maintenance and replacement.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pump suction type multi-gas on-line monitoring and analysis box for a confined space, comprising a box body and a bridge. A bridge is fixedly connected to the upper inner side of the box body. An air inlet hood is fixedly connected to the upper side of the box body. A second valve and a fifth valve are fixedly connected to the left side of the box body. A first oil-water filter, a first air filter, a first diaphragm pump, a combustible gas detector, a first sound and light alarm lamp, a second sound and light alarm lamp, a second diaphragm pump, a first adjustable flowmeter, a VOCs volatile organic compound detector, a first wiring terminal, a second wiring terminal, a third wiring terminal, a fourth wiring terminal, a second oil-water filter, a second adjustable flowmeter, a gas mixing tank, a second air filter, a stainless steel flowmeter and a waste water collection box are fixedly connected to the inner side of the box body. The bottom of the air inlet hood is fixedly connected to a first valve through a connecting pipe. The right end of the first valve is fixedly connected to the first oil-water filter through a connecting pipe. The right end of the first oil-water filter is fixedly connected to the first air filter through a connecting pipe. The right end of the first air filter is fixedly connected to the first diaphragm pump through a connecting pipe. The left end of the first diaphragm pump is fixedly connected to the first adjustable flowmeter through a connecting pipe. The left side of the first adjustable flowmeter is fixedly connected to the gas mixing tank through a connecting pipe. The right end of the second valve is fixedly connected to the second oil-water filter. The right side of the second oil-water filter is fixedly connected to the second diaphragm pump through a connecting pipe. The left side of the second diaphragm pump is fixedly connected to the second adjustable flowmeter through a connecting pipe. The right side of the second adjustable flowmeter is fixedly connected to the gas mixing tank through a connecting pipe. The left side of the second diaphragm pump is fixedly connected to a fourth valve through a connecting pipe. The right end of the fourth valve is fixedly connected to the stainless steel flowmeter through a connecting pipe. The top of the stainless steel flowmeter is fixedly connected to the combustible gas detector through a connecting pipe. The bottom of the combustible gas detector is fixedly connected to a one-way check valve through a connecting pipe. The right end of the combustible gas detector is fixedly connected to the first sound and light alarm lamp and the second sound and light alarm lamp. The top of the stainless steel flowmeter is fixedly connected to the one-way check valve through a connecting pipe. The right side of the gas mixing tank is fixedly connected to the second air filter through a connecting pipe. The top of the second air filter is fixedly connected to the VOCs volatile organic compound detector. The right side of the second air filter is fixedly connected to the one-way check valve through a connecting pipe. The right side of the gas mixing tank is fixedly connected to a third valve through a connecting pipe. The right end of the third valve is fixedly connected to the one-way check valve. The left end of the one-way check valve is fixedly connected to the fifth valve. The bottoms of the first oil-water filter and the second oil-water filter are fixedly connected to the waste water collection box through a connecting pipe.

[0007] Preferably, the box body is a rectangular box, and the air inlet hood, the second valve and the second valve are all partially located outside the box body.

[0008] Preferably, the first diaphragm pump, the combustible gas detector, the second diaphragm pump, the VOCs volatile organic compound detector, the first terminal, the second terminal, the third terminal, and the fourth terminal are electrically connected to the bridge respectively, and the first terminal, the second terminal, the third terminal, and the fourth terminal have the same model.

[0009] Preferably, the first diaphragm pump and the second diaphragm pump have the same model, the first oil-water filter and the second oil-water filter have the same model, and the first air filter and the second air filter have the same model.

[0010] Preferably, the air inlet hood, the first valve, the first oil-water filter, the first air filter, the first diaphragm pump, the first adjustable flowmeter, and the gas mixing tank are connected in sequence, the second valve, the second oil-water filter, the second diaphragm pump, the second adjustable flowmeter, and the gas mixing tank are connected in sequence, and the second valve, the second oil-water filter, the second diaphragm pump, the fourth valve, the stainless steel flowmeter, and the combustible gas detector are connected in sequence.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] In the present utility model, through the arranged air inlet hood, the first oil-water filter, the first air filter, the first diaphragm pump, the combustible gas detector, the second diaphragm pump, the VOCs volatile organic compound detector, the second oil-water filter, the gas mixing tank, the second air filter, and the waste water collection box, the device can extract and detect the gas in the closed space, and then discharge the detected gas back into the closed space, forming a gas cycle to continuously detect the gas without polluting the atmosphere. The device can be fixed outside the closed space. If the liquid level inside the closed space changes, it is relatively convenient to change the fixed position and height of the device to ensure normal gas detection and facilitate maintenance by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0014] In the figure: 1. Air inlet hood; 2. First valve; 3. First oil-water filter; 4. First air filter; 5. First diaphragm pump; 6. Combustible gas detector; 7. First audible and visual alarm light; 8. Second audible and visual alarm light; 9. Second diaphragm pump; 10. First adjustable flowmeter; 11. VOCs volatile organic compound detector; 12. First terminal; 13. Second terminal; 14. Third terminal; 15. Fourth terminal; 16. Second valve; 17. Second oil-water filter; 18. Second adjustable flowmeter; 19. Gas mixing tank; 20. Second air filter; 21. Third valve; 22. Stainless steel flowmeter; 23. Fourth valve; 24. Check valve; 25. Waste water collection box; 26. Fifth valve; 27. Box body; 28. Bridge. Detailed implementation manners

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0017] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, these words have no special meanings, so it cannot be understood as a limitation on the protection scope of the present invention.

[0018] Please refer to Figure 1 , the present invention provides a technical solution:

[0019] A pump-suction multi-gas online monitoring and analysis box for a confined space, comprising a box body 27 and a bridge 28. The upper end inside the box body 27 is fixedly connected with the bridge 28. The upper side of the box body 27 is fixedly connected with an air inlet hood 1. The left side of the box body 27 is fixedly connected with a second valve 16 and a fifth valve 26. Inside the box body 27 are fixedly connected with a first oil-water filter 3, a first air filter 4, a first diaphragm pump 5, a combustible gas detector 6, a first sound and light alarm lamp 7, a second sound and light alarm lamp 8, a second diaphragm pump 9, a first adjustable flowmeter 10, a VOCs volatile organic compound detector 11, a first terminal block 12, a second terminal block 13, a third terminal block 14, a fourth terminal block 15, a second oil-water filter 17, a second adjustable flowmeter 18, a gas mixing tank 19, a second air filter 20, a stainless steel flowmeter 22 and a waste water collection box 25. The bottom of the air inlet hood 1 is fixedly connected with a first valve 2 through a connecting pipe. The right end of the first valve 2 is fixedly connected with the first oil-water filter 3 through a connecting pipe. The right end of the first oil-water filter 3 is fixedly connected with the first air filter 4 through a connecting pipe. The right end of the first air filter 4 is fixedly connected with the first diaphragm pump 5 through a connecting pipe. The left end of the first diaphragm pump 5 is fixedly connected with the first adjustable flowmeter 10 through a connecting pipe. The left side of the first adjustable flowmeter 10 is fixedly connected with the gas mixing tank 19 through a connecting pipe. The right end of the second valve 16 is fixedly connected with the second oil-water filter 17. The right side of the second oil-water filter 17 is fixedly connected with the second diaphragm pump 9 through a connecting pipe. The left side of the second diaphragm pump 9 is fixedly connected with the second adjustable flowmeter 18 through a connecting pipe. The right side of the second adjustable flowmeter 18 is fixedly connected with the gas mixing tank 19 through a connecting pipe. The left side of the second diaphragm pump 9 is fixedly connected with a fourth valve 23 through a connecting pipe. The right end of the fourth valve 23 is fixedly connected with the stainless steel flowmeter 22 through a connecting pipe. The top of the stainless steel flowmeter 22 is fixedly connected with the combustible gas detector 6 through a connecting pipe. The bottom of the combustible gas detector 6 is fixedly connected with a one-way check valve 24 through a connecting pipe. The right end of the combustible gas detector 6 is fixedly connected with the first sound and light alarm lamp 7 and the second sound and light alarm lamp 8. The top of the stainless steel flowmeter 22 is fixedly connected with the one-way check valve 24 through a connecting pipe. The right side of the gas mixing tank 19 is fixedly connected with the second air filter 20 through a connecting pipe. The top of the second air filter 20 is fixedly connected with the VOCs volatile organic compound detector 11. The right side of the second air filter 20 is fixedly connected with the one-way check valve 24 through a connecting pipe. The right side of the gas mixing tank 19 is fixedly connected with a third valve 21 through a connecting pipe. The right end of the third valve 21 is fixedly connected with the one-way check valve 24. The left end of the one-way check valve 24 is fixedly connected with the fifth valve 26. The bottoms of the first oil-water filter 3 and the second oil-water filter 17 are fixedly connected with the waste water collection box 25 through a connecting pipe.

[0020] The box body 27 is a rectangular box. The air inlet hood 1, the second valve 16, and the second valve 16 are all partially located outside the box body 27 and can inhale or discharge gas. The first diaphragm pump 5, the combustible gas detector 6, the second diaphragm pump 9, the VOCs volatile organic compound detector 11, the first terminal 12, the second terminal 13, the third terminal 14, and the fourth terminal 15 are respectively electrically connected to the bridge 28. The first terminal 12, the second terminal 13, the third terminal 14, and the fourth terminal 15 have the same model and can be used for circuit connection. The first diaphragm pump 5 and the second diaphragm pump 9 have the same model. The first oil-water filter 3 and the second oil-water filter 17 have the same model. The first air filter 4 and the second air filter 20 have the same model. They can simultaneously inhale the external air and the air inside the enclosed space and process them separately. The air inlet hood 1, the first valve 2, the first oil-water filter 3, the first air filter 4, the first diaphragm pump 5, the first adjustable flowmeter 10, and the gas mixing tank 19 are connected in sequence. The second valve 16, the second oil-water filter 17, the second diaphragm pump 9, the second adjustable flowmeter 18, and the gas mixing tank 19 are connected in sequence. The second valve 16, the second oil-water filter 17, the second diaphragm pump 9, the fourth valve 23, the stainless steel flowmeter 22, and the combustible gas detector 6 are connected in sequence, which can make the inhaled gas flow continuously and facilitate the treatment of the gas.

[0021] Workflow: Before use, fix the left end of the device outside the enclosed space, so that the opening of the air intake hood 1 is outside the enclosed space, the openings of the second valve 16 and the fifth valve 26 are inside the enclosed space, and connect the first terminal 12 and the second terminal 13 to an external controller. The first terminal 12 and the second terminal 13 can supply power to each electrical instrument through the cable tray 28, so that the two signal lines output by the relay on the internal circuit board of the VOCs volatile organic compound detector 11 are electrically connected through the cable tray 28 and the third terminal 14, and the two signal lines output by the relay on the internal circuit board of the combustible gas detector 6 are electrically connected through the cable tray 28 and the fourth terminal 15;When using this device, it can be operated through an external controller to turn on the first diaphragm pump 5. The first diaphragm pump 5 extracts external air through the air inlet hood 1 and the first valve 2 into the first oil-water filter 3. The first oil-water filter 3 dries the air, removes water, oil, impurities, etc. The first valve 2 controls the on / off and flow rate of the gas path, and the first oil-water filter 3 adjusts the gas pressure. Then the gas enters the first air filter 4, and the first air filter 4 filters out volatile toxic gases such as VOCs. After the gas comes to the first diaphragm pump 5, it undergoes precise flow adjustment through the first adjustable flowmeter 10 and then enters the gas mixing tank 19 for mixing. At the same time, the second diaphragm pump 9 is turned on. The second diaphragm pump 9 extracts the gas to be detected in the enclosed space through the second valve 16 into the second oil-water filter 17. The second valve 16 controls the on / off and flow rate of the gas path, and the second oil-water filter 17 dries the gas to be detected, removes water, oil, impurities, and adjusts the pressure, etc. Then the gas starts to split into two paths. One path of the gas undergoes precise flow adjustment through the second adjustable flowmeter 18 and then enters the gas mixing tank 19 for mixing. The other path of the gas has its on / off and flow rate controlled by the fourth valve 23, is monitored for flow rate through the stainless steel flowmeter 22, and then is detected by the combustible gas detector 6. The gas after being mixed in the gas mixing tank 19 is sent to the bottom of the sampler of the VOCs volatile organic compound detector 11 through the second air filter 20 for detection. The third valve 21 plays a role in regulating the flow. The detected gas enters the one-way check valve 24 from the VOCs volatile organic compound detector 11 and the combustible gas detector 6 respectively, and then returns to the enclosed space through the fifth valve 26 to avoid gas leakage and pollution to the atmosphere. The waste water discharged from the first oil-water filter 3 and the second oil-water filter 17 is collected by the waste water collection box 25 and regularly disposed of by maintenance personnel. This device can extract and detect the gas in the enclosed space, and then re-discharge the detected gas into the enclosed space, forming a gas cycle and continuously detecting the gas without polluting the atmosphere. This device can be fixed outside the enclosed space. If the liquid level inside the enclosed space changes, it is relatively convenient to change the fixed position and height of this device to ensure normal gas detection and facilitate maintenance by the staff.;

[0022] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The standard parts used in this utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0023] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pump-suction multi-gas online monitoring and analysis box for a confined space, comprising a box body (27) and a bridge frame (28), characterized in that: The upper inner end of the box (27) is fixedly connected to a bridge frame (28), the upper side of the box (27) is fixedly connected to an air intake hood (1), the left side of the box (27) is fixedly connected to a second valve (16) and a fifth valve (26), the inner side of the box (27) is fixedly connected to a first oil-water filter (3), a first air filter (4), a first diaphragm pump (5), a combustible gas detector (6), a first sound and light alarm lamp (7), a second sound and light alarm lamp (8), a second diaphragm pump (9), a first adjustable flow meter (10), a VOCs volatile organic compound detector (11), a first wiring terminal (12), a second wiring terminal (13), a third wiring terminal (14), a fourth wiring terminal (15), a second An oil-water filter (17), a second adjustable flow meter (18), a gas mixing tank (19), a second air filter (20), a stainless steel flow meter (22) and a wastewater collection box (25); the bottom of the air intake cover (1) is fixedly connected to the first valve (2) via a connecting pipe; the right end of the first valve (2) is fixedly connected to the first oil-water filter (3) via a connecting pipe; the right end of the first oil-water filter (3) is fixedly connected to the first air filter (4) via a connecting pipe; the right end of the first air filter (4) is fixedly connected to the first diaphragm pump (5) via a connecting pipe; the left end of the first diaphragm pump (5) is fixedly connected to the first adjustable flow meter (10) via a connecting pipe; the left side of the first adjustable flow meter (10) is fixedly connected to the first air filter (4) via a connecting pipe; The second diaphragm pump (9) is fixedly connected to a gas mixing tank (19) through a connecting pipe, the right end of the second valve (16) is fixedly connected to a second oil-water filter (17), the right side of the second oil-water filter (17) is fixedly connected to a second diaphragm pump (9) through a connecting pipe, the left side of the second diaphragm pump (9) is fixedly connected to a second adjustable flow meter (18) through a connecting pipe, the right side of the second adjustable flow meter (18) is fixedly connected to the gas mixing tank (19) through a connecting pipe, the left side of the second diaphragm pump (9) is fixedly connected to a fourth valve (23) through a connecting pipe, the right end of the fourth valve (23) is fixedly connected to a stainless steel flow meter (22) through a connecting pipe, the top of the stainless steel flow meter (22) is fixedly connected to a combustible gas detector (6) through a connecting pipe, The bottom of the combustible gas detector (6) is fixedly connected to a one-way check valve (24) via a connecting pipe, the right end of the combustible gas detector (6) is fixedly connected to a first sound and light alarm lamp (7) and a second sound and light alarm lamp (8), the top of the stainless steel flow meter (22) is fixedly connected to the one-way check valve (24) via a connecting pipe, the right side of the gas mixing tank (19) is fixedly connected to a second air filter (20) via a connecting pipe, the top of the second air filter (20) is fixedly connected to a VOCs volatile organic compound detector (11), the right side of the second air filter (20) is fixedly connected to the one-way check valve (24) via a connecting pipe, and the right side of the gas mixing tank (19) is fixedly connected to a third valve (21) via a connecting pipe.The right end of the third valve (21) is fixedly connected to a one-way check valve (24), the left end of the one-way check valve (24) is fixedly connected to a fifth valve (26), and the bottoms of the first oil-water filter (3) and the second oil-water filter (17) are fixedly connected to a wastewater collection box (25) via a connecting pipe.

2. The pump-suction multi-gas online monitoring and analysis box for a confined space according to claim 1, characterized in that: The box body (27) is a rectangular box, and the air inlet cover (1), the second valve (16) and the second valve (16) are all partially located outside the box body (27).

3. The pump-suction multi-gas online monitoring and analysis box for a confined space according to claim 1 is characterized in that: The first diaphragm pump (5), the combustible gas detector (6), the second diaphragm pump (9), the VOCs volatile organic compound detector (11), the first wiring terminal (12), the second wiring terminal (13), the third wiring terminal (14), and the fourth wiring terminal (15) are respectively electrically connected to the bridge (28), and the first wiring terminal (12), the second wiring terminal (13), the third wiring terminal (14), and the fourth wiring terminal (15) are of the same model.

4. The pump-suction multi-gas online monitoring and analysis box for a confined space according to claim 1, characterized in that: The first diaphragm pump (5) and the second diaphragm pump (9) are of the same model, the first oil-water filter (3) and the second oil-water filter (17) are of the same model, and the first air filter (4) and the second air filter (20) are of the same model.

5. The pump-suction multi-gas online monitoring and analysis box for a confined space according to claim 1, characterized in that: The air intake hood (1), the first valve (2), the first oil-water filter (3), the first air filter (4), the first diaphragm pump (5), the first adjustable flow meter (10), and the gas mixing tank (19) are connected in sequence; the second valve (16), the second oil-water filter (17), the second diaphragm pump (9), the second adjustable flow meter (18), and the gas mixing tank (19) are connected in sequence; the second valve (16), the second oil-water filter (17), the second diaphragm pump (9), the fourth valve (23), the stainless steel flow meter (22), and the combustible gas detector (6) are connected in sequence.

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